Doing business with other dealers is at the heart of the antique and collectible business, and today Ian is travelling all around the country to find the very best items to buy and sell on for a profit. He's also on the search for a very special antique for a friend and contact in the US – celebrity tattooist Mark Mahoney – whose clients include Johnny Depp and Angelina Jolie. In his quest to find the right object for Mark, Ian buys a range of historical Irish pieces – including some trench art from WW1, a portrait of a cooper at the Guinness Brewery, chairs from St Patrick's Cathedral in Dublin and some medals from an Irish Revolutionary and spy…. But when Mark arrives at Mulligans HQ will he like what he's shown and be prepared to pay top dollar?